SPC Performance F Body 2nd Gen Tubular Lower Front Control ArmA perfect complement to SPC adjustable upper control arms, these lower arms drop the front end by 1" and feature 2. 50 degrees positive caster for a ready to run, aggressive stance on '70 '81 GM 'F' Body and additional GM applications. Strong, tubular construction allows ride height to be fine tuned with market available spring kits, or use 'standard' replacement springs to raise the ride height as desired. Use SPC Coilover Mount and Spacer Plates for